In Mac OS X, all document based applications will show the filename and icon in the document's title bar. From this icon you can drag and drop it to other applications such as attaching it to an email, move or copy it to another location, or if you hold down command and click, it will show the path to the document.
Is there an equivalent in Windows (7)?, built in, or via system extension.
Currently if I'm working on a document and I want to attach it to a reply email, I find the easiest method is to 'Save As' and then drag and drop from the File Dialog to my email.